31 lines
1.1 KiB
Go
31 lines
1.1 KiB
Go
package tomo
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import "image"
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// LayoutEntry associates an element with layout and positioning information so
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// it can be arranged by a Layout.
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type LayoutEntry struct {
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Element
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Bounds image.Rectangle
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Expand bool
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}
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// Layout is capable of arranging elements within a container. It is also able
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// to determine the minimum amount of room it needs to do so.
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type Layout interface {
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// Arrange takes in a slice of entries and a bounding width and height,
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// and changes the position of the entiries in the slice so that they
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// are properly laid out. The given width and height should not be less
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// than what is returned by MinimumSize.
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Arrange (entries []LayoutEntry, bounds image.Rectangle)
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// MinimumSize returns the minimum width and height that the layout
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// needs to properly arrange the given slice of layout entries.
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MinimumSize (entries []LayoutEntry) (width, height int)
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// FlexibleHeightFor Returns the minimum height the layout needs to lay
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// out the specified elements at the given width, taking into account
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// flexible elements.
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FlexibleHeightFor (entries []LayoutEntry, squeeze int) (height int)
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}
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